WO2007054888A2 - Device for and method of generating a vibration source-driving-signal - Google Patents
Device for and method of generating a vibration source-driving-signal Download PDFInfo
- Publication number
- WO2007054888A2 WO2007054888A2 PCT/IB2006/054138 IB2006054138W WO2007054888A2 WO 2007054888 A2 WO2007054888 A2 WO 2007054888A2 IB 2006054138 W IB2006054138 W IB 2006054138W WO 2007054888 A2 WO2007054888 A2 WO 2007054888A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- generating
- vibration
- input
- source
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
- H04R3/14—Cross-over networks
Definitions
- the invention further relates to a method of generating a vibration source- driving signal.
- the invention also relates to a program element.
- Such a gaming headphone has been introduced on the market by the applicant and is known, for instance, by the model name of "SHG8100".
- the generating means may comprise a first detection unit having a first time response, which first detection unit is adapted to supply the stationary signal, and a second detection unit having a second time response, which second detection unit is adapted to supply the fluctuating signal.
- the level difference of the signals of these two detection units may be used to generate a control signal that is directly related to the dynamic changes of the input signal, which control signal is used in a further processing operation.
- a low-pass filter may be used before the generating means. This focuses the generation of the vibration source-driving signal on a low- frequency signal part.
- the purpose of vibration is to enhance the sensation of the Io w- frequency effect or assist the loudspeaker system that is not capable of producing sounds of a very low frequency.
- the vibration signal comes from a low-frequency part of the signal; interferences of middle and high-frequency parts may advantageously be avoided. This may be particularly advantageous in applications in which the vibration motor represents or reproduces the low frequencies of the audio signal as a vibration only, not as audible sound, but has a direct relation with the frequency content of the audio signal.
- Fig. 4 shows a further device for generating a vibration source-driving signal in accordance with an embodiment of the invention.
- Fig. 11 shows a detailed embodiment of a level detector shown in Fig. 8.
- the device 100 for generating a vibration source driving signal DS comprises an input 101 for receiving an input signal IS and an output 102 for supplying said driving signal DS, generating means 103 adapted to generate a control signal CS which is representative of dynamic signal changes of the input signal IS, and a processing unit 105 adapted to process a source signal SRS based on the control signal CS yielding said driving signal DS.
- the generating means 103 comprises an extraction unit 103 a adapted to extract or generate a stationary signal StS and a fluctuating signal FlS from the input signal IS, and combining means 104 for generating the control signal CS based on a combination of said stationary signal StS and said fluctuating signal FlS.
- the extraction unit 103 a comprises a first detection unit 106 having a first time response, which first detection unit 106 is adapted to supply the stationary signal StS, and a second detection unit 107 having a second time response, which second detection unit 107 is adapted to supply the fluctuating signal FlS.
- the first detection unit 106 is adapted as a root-mean- square (RMS) detector having a comparable, slow time response
- the second detection unit 107 is adapted as a peak detector having a comparable, fast time response.
- the root-mean-square (RMS) detector has a time response of 0.05 second and the peak detector has a time response of 0.01 second.
- Other time response values may be appropriate, for example, 10% to 50% above or below the values mentioned.
- parameter setting means may be provided, which parameter setting means are designed to tune or adapt the time responses.
- the detection units may be based on other detectors, for example, a further peak detector may be provided instead of the root-mean-square (RMS) detector, the further peak detector then having a comparable, slow time response.
- RMS root-mean-square
- the combining means 104 for generating the control signal CS are adapted as a subtraction unit for subtracting the fluctuating signal FlS from the stationary signal StS, or vice versa.
- a further device 200 for generating a vibration source-driving signal in accordance with an embodiment of the invention will now be described with reference to Fig. 2.
- the device 200 shown in Fig. 2 differs from the device 100 of Fig. 1 in that the processing unit 105 shown in Fig. 1 is designed as a gain control unit 201 adapted to receive the input signal IS as the source signal and to control the input signal IS based on the control signal CS so as to receive the driving signal DS.
- the processing unit 105 shown in Fig. 1 is designed as a gain control unit 201 adapted to receive the input signal IS as the source signal and to control the input signal IS based on the control signal CS so as to receive the driving signal DS.
- the driving signal DS can be supplied to an electrodynamic vibration unit 202, which acts as a vibration source for generating vibrations based on the driving signal DS.
- the electrodynamic vibration unit 202 is similar to a normal loudspeaker.
- the input signal IS may be an audio signal, which may be modulated in the gain control unit 201 based on the control signal CS. A stationary signal part of the input signal IS may thereby be compressed and a dynamically fluctuating signal part of the input signal IS may be emphasized.
- Fig. 5 shows a detailed embodiment of the gain control unit 201.
- the gain control unit 201 comprises an amplifier 501 and dynamic range manipulation means 502, which are adapted to manipulate the control signal CS yielding a manipulated control signal CS', and which amplifier 501 is adapted to amplify the source signal SRS based on the manipulated control signal CS'.
- the dynamic range manipulation means 502 may be a dynamic compressor or expander.
- a further device 300 for generating a vibration source-driving signal in accordance with an embodiment of the invention will now be described with reference to Fig. 3.
- the device 300 shown in Fig. 3 differs from the device 200 of Fig. 2 in that the gain control unit 201 shown in Fig. 2 is designed as a gain control unit 301 adapted to receive an input DC voltage as a source signal SRS2 and to control the source signal SRS2 based on the control signal CS so as to receive a driving signal DS2.
- the input DC voltage may be provided by a DC voltage source 302.
- the DC voltage source 302 is provided by the same power source (not shown) as that used for powering the device 300.
- the DC voltage source 302 may be any device or system that produces an electromotive force between at least two terminals, or derives a secondary voltage from a primary source of the electromotive force.
- a further device 400 for generating a vibration source-driving signal in accordance with an embodiment of the invention will now be described with reference to Fig. 4.
- the audio signal-processing system 600 further comprises a low-pass filter 603 adapted to receive the input audio signal IAS and to apply a low-pass filtered input audio signal as an input signal IS to the device 200 for generating a vibration source driving signal DS.
- the purpose of vibration is to enhance the sensation of the low- frequency effect or to assist the loudspeaker system that is not capable of producing sounds of a very low frequency.
- the vibration signal is advantageously derived from a low- frequency part of an input signal, and interferences of middle and high-frequency parts of the input signal are avoided.
- FIG. 7 A diagram 700 of signals occurring in a device 200 for generating a vibration source-driving signal in accordance with an embodiment of the invention will now be described with reference to Fig. 7.
- a first plot 701 is a low-pass filtered audio signal representing the input signal IS.
- a second plot 702 shows a control signal CS generated by the combining means 104.
- a third plot 703 shows the output signal of the dynamic range manipulation means 502, which is the manipulated control signal CS' for controlling, via the amplifier 501, the gain of the low-pass filtered audio signal.
- a fourth plot 704 shows the driving signal DS outputted from the amplifier 501. The fourth plot 704 clearly shows that the stationary parts or steady-state parts, respectively, of the input signal IS have been removed or at least significantly attenuated, whereas dynamic parts have been amplified.
- the audio signal-processing system 800 is adapted as a portable device such as a mobile phone and comprises an audio signal source 801, a device 802 for generating a vibration source driving signal DS, an audio signal modification unit 807, a level detector 808, and an envelope determination unit 809.
- the device 802 for generating the vibration source-driving signal DS comprises generating means 803 and a processing unit 804.
- the processing unit 804 comprises a comparator 805 and a motor control unit 806.
- the motor control unit 806 applies the driving signal DS to a vibration motor 303.
- the audio signal source 801 is a stereo signal source comprising a stereo audio signal, i.e. a left and a right audio signal.
- the envelope determination unit 809 is shown in more detail in Fig. 10.
- the envelope determination unit 809 comprises a band pass filter 1001, an envelope detector 1002, and a low-pass filter 1003.
- the band pass filter 1001 is adapted to process the input audio signal IAS and to apply a filtered- filtered audio signal to the envelope detector 1002.
- the envelope detector 1002 applies an envelope signal to the low-pass filter 1003, which outputs a low-pass filtered signal IS to the generating means 803.
- a Butterworth band-pass filter of filter order 2 to 3 per slope in this case constitutes the band-pass filter 1001.
- the level detector 8008 is adapted to provide level information LI of the signal level of the source signal IAS. In the present case, the level detector 808 is adapted as dynamic level detector
- the dynamic level detector 1101 for following changes in the level of the source signal IAS yielding a dynamic level signal, and applies this dynamic level signal to a threshold unit 1102, which is adapted to provide said level information LI based on the dynamic level signal and a threshold value.
- the dynamic level detector 1101 will follow changes in the average level of the input audio signal IAS. It makes use of an attack and decay time and has only the purpose of following the long turn average level of the input audio signal IAS. The attack and release times can be relatively long.
- the applied integrator-based level detector of the dynamic level detector 1101 is defined by the following equation:
- y[n] ⁇ x[n] + KP * (y[n -l]- ⁇ x[n])+ KM *
- Ta denotes the attack time
- Tr denotes the release time of the detector.
- the attack time is 0.1 second and the release time is 0.1 second.
- other values for the attack time and release time may be applied, for instance, the previous example divided or multiplied by a factor of two (2) or three (3), and so forth.
- the system should not react to low- level noise or "rumble" in the input audio signal IAS, but only react as the input audio signal IAS reaches a certain level.
- the threshold unit 1102 is provided.
- the applied threshold value of the threshold unit 1102 may depend on the internal signal levels of the mobile device (or mobile phone), for example, it may be l/5th to l/6th of the peak level of the dynamic level detector 1101.
- the processing unit 804 comprises the comparator 805 and the motor control unit 806.
- the comparator 805 is adapted to generate a PWM signal on the basis of the control signal CS and the level information LI as shown in the Table below:
- the output of the comparator 805 is applied to the motor control unit 806.
- the PWM signal from the comparator 805 is transferred into a dedicated vibration source driving signal DS for the vibration motor 303.
- This vibration source driving signal DS is dependent on the architecture of the mobile device (or mobile phone) and the applied vibration motor 303.
- the vibration motor 303 will move as a function of the low- frequency content of the input audio signal IAS (music or song or game), while the vibration motor 303 will not turn in the case of steady-state signals in the input audio signal IAS.
- the vibration source driving signal DS will follow the beat or rhythm of the song, while it will enhance low-frequency effects such as explosions or accelerating cars in games.
- the audio signal modification unit 807 is adapted to process the input audio signal IAS and to apply a processed or modified audio signal to a sound reproduction means 810, which is a loudspeaker in this case.
- the audio signal modification unit 807 comprises a high-pass filter followed by a delay.
- the high-pass filter is used to prevent that the loudspeaker is operated below its operating frequency range, and is thus overloaded.
- the cutoff frequency of the high-pass filter is determined by the specification of the loudspeaker.
- the high-pass filter may be a Butterworth filter of filter order 2 to 3 and a cut-off frequency in a frequency range of 250 Hz to 500 Hz or 600 Hz.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008539575A JP5627852B2 (en) | 2005-11-10 | 2006-11-07 | Apparatus and method for generating vibration source drive signal |
CN2006800418232A CN101305641B (en) | 2005-11-10 | 2006-11-07 | Device for and method of generating a vibration source-driving-signal |
US12/092,712 US8175302B2 (en) | 2005-11-10 | 2006-11-07 | Device for and method of generating a vibration source-driving-signal |
EP06821349.5A EP1949751B1 (en) | 2005-11-10 | 2006-11-07 | Device for and method of generating a vibration source-driving-signal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05110621 | 2005-11-10 | ||
EP05110621.9 | 2005-11-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2007054888A2 true WO2007054888A2 (en) | 2007-05-18 |
WO2007054888A3 WO2007054888A3 (en) | 2007-10-18 |
Family
ID=38023656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2006/054138 WO2007054888A2 (en) | 2005-11-10 | 2006-11-07 | Device for and method of generating a vibration source-driving-signal |
Country Status (5)
Country | Link |
---|---|
US (1) | US8175302B2 (en) |
EP (1) | EP1949751B1 (en) |
JP (1) | JP5627852B2 (en) |
CN (1) | CN101305641B (en) |
WO (1) | WO2007054888A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009125326A1 (en) * | 2008-04-09 | 2009-10-15 | Koninklijke Philips Electronics N.V. | Generation of a drive signal for sound transducer |
CN108848257A (en) * | 2018-06-06 | 2018-11-20 | 北京小米移动软件有限公司 | The method and device of controlling terminal vibration |
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US20030230921A1 (en) * | 2002-05-10 | 2003-12-18 | George Gifeisman | Back support and a device provided therewith |
DE102008024102A1 (en) * | 2008-05-17 | 2009-12-03 | Diehl Ako Stiftung & Co. Kg | Motor control for driving an electric motor |
US20100198376A1 (en) * | 2009-02-05 | 2010-08-05 | Sony Corporation | Personal audio device |
EP2606572A1 (en) * | 2010-08-18 | 2013-06-26 | Dolby Laboratories Licensing Corporation | Method and system for controlling distortion in a critical frequency band of an audio signal |
CN102207737B (en) * | 2011-02-12 | 2013-03-13 | 浙江吉利汽车研究院有限公司 | Car noise response type seat adjustment control system and control method thereof |
JP5352634B2 (en) * | 2011-07-11 | 2013-11-27 | 株式会社エヌ・ティ・ティ・ドコモ | Input device |
US10117036B2 (en) | 2011-07-15 | 2018-10-30 | Mediatek Inc. | Calibration method and calibration module thereof for vibration device |
US9124961B2 (en) * | 2011-07-15 | 2015-09-01 | Mediatek Inc. | Control device for driving multi-function speaker by using digital mixing scheme and related control method thereof |
TW201334248A (en) * | 2011-10-21 | 2013-08-16 | Bayer Materialscience Ag | Dielectric elastomer membrane feedback apparatus, system, and method |
KR101869562B1 (en) * | 2011-12-27 | 2018-07-24 | 삼성전자주식회사 | Apparatus and method for gernerating vibration by using sound characteristics |
CN102892057A (en) * | 2012-10-12 | 2013-01-23 | 歌尔声学股份有限公司 | Headset and vibration headset realization method |
EP2890153B1 (en) | 2013-12-30 | 2020-02-26 | Skullcandy, Inc. | Headphones for stereo tactile vibration, and related systems and methods |
US10986454B2 (en) | 2014-01-06 | 2021-04-20 | Alpine Electronics of Silicon Valley, Inc. | Sound normalization and frequency remapping using haptic feedback |
US8767996B1 (en) | 2014-01-06 | 2014-07-01 | Alpine Electronics of Silicon Valley, Inc. | Methods and devices for reproducing audio signals with a haptic apparatus on acoustic headphones |
US8977376B1 (en) | 2014-01-06 | 2015-03-10 | Alpine Electronics of Silicon Valley, Inc. | Reproducing audio signals with a haptic apparatus on acoustic headphones and their calibration and measurement |
JP6258061B2 (en) * | 2014-02-17 | 2018-01-10 | クラリオン株式会社 | Acoustic processing apparatus, acoustic processing method, and acoustic processing program |
US9749733B1 (en) * | 2016-04-07 | 2017-08-29 | Harman Intenational Industries, Incorporated | Approach for detecting alert signals in changing environments |
US10872592B2 (en) | 2017-12-15 | 2020-12-22 | Skullcandy, Inc. | Noise-canceling headphones including multiple vibration members and related methods |
US10484792B2 (en) | 2018-02-16 | 2019-11-19 | Skullcandy, Inc. | Headphone with noise cancellation of acoustic noise from tactile vibration driver |
JP2021177264A (en) * | 2018-07-31 | 2021-11-11 | ソニーグループ株式会社 | Information processor, information processing method, and program |
IT201900002171A1 (en) * | 2019-02-14 | 2020-08-14 | I&G Tech S A S Di Amadio Giancarlo & C | Method and system for providing a perception of a musical or vocal or sound audio enriched by tactile stimuli |
JP7340983B2 (en) * | 2019-07-29 | 2023-09-08 | フォルシアクラリオン・エレクトロニクス株式会社 | Vibration signal generation device and vibration signal generation program |
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2006
- 2006-11-07 WO PCT/IB2006/054138 patent/WO2007054888A2/en active Application Filing
- 2006-11-07 CN CN2006800418232A patent/CN101305641B/en not_active Expired - Fee Related
- 2006-11-07 JP JP2008539575A patent/JP5627852B2/en not_active Expired - Fee Related
- 2006-11-07 EP EP06821349.5A patent/EP1949751B1/en not_active Not-in-force
- 2006-11-07 US US12/092,712 patent/US8175302B2/en active Active
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GB2170666A (en) | 1985-02-01 | 1986-08-06 | Sanden Corp | Audio system including an electromechanical vibrator controlled in accordance with ambient noise |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2009125326A1 (en) * | 2008-04-09 | 2009-10-15 | Koninklijke Philips Electronics N.V. | Generation of a drive signal for sound transducer |
JP2011517909A (en) * | 2008-04-09 | 2011-06-16 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Drive signal generation for audio transducers |
CN102007777B (en) * | 2008-04-09 | 2014-08-20 | 皇家飞利浦电子股份有限公司 | Generation of a drive signal for sound transducer |
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CN108848257A (en) * | 2018-06-06 | 2018-11-20 | 北京小米移动软件有限公司 | The method and device of controlling terminal vibration |
Also Published As
Publication number | Publication date |
---|---|
EP1949751A2 (en) | 2008-07-30 |
US8175302B2 (en) | 2012-05-08 |
JP2009516212A (en) | 2009-04-16 |
CN101305641B (en) | 2012-04-25 |
WO2007054888A3 (en) | 2007-10-18 |
US20080240484A1 (en) | 2008-10-02 |
JP5627852B2 (en) | 2014-11-19 |
EP1949751B1 (en) | 2016-01-27 |
CN101305641A (en) | 2008-11-12 |
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